1 files changed, 2 insertions, 0 deletions
diff --git a/boot/boot.c b/boot/boot.c
index 1f02947f..0a7091e3 100644
--- a/boot/boot.c
+++ b/boot/boot.c
@@ -1460,6 +1460,8 @@ S_io_read (mach_port_t object,
       if (amount > *datalen)
 	*data = mmap (0, amount, PROT_READ|PROT_WRITE, MAP_ANON, 0, 0);
       *datalen = read (0, *data, amount);
+      if (*datalen == -1)
+	munmap (*data, amount);
       unlock_readlock ();
       return *datalen == -1 ? errno : 0;
     }